From cbe1a5f96fc6e518744bfe5d8ee78364c1fd298b Mon Sep 17 00:00:00 2001
From: MMT <m.m.talaie@live.com>
Date: Wed, 27 Jul 2022 12:25:05 +0430
Subject: [PATCH] write stipple line with shaders

---
 lineStipple.fs | 16 ++++++++++++++++
 lineStipple.vs | 16 ++++++++++++++++
 2 files changed, 32 insertions(+)
 create mode 100644 lineStipple.fs
 create mode 100644 lineStipple.vs

diff --git a/lineStipple.fs b/lineStipple.fs
new file mode 100644
index 0000000..633a7ee
--- /dev/null
+++ b/lineStipple.fs
@@ -0,0 +1,16 @@
+#version 330 core
+in vec4 color;
+
+in float dist;
+uniform vec2  u_resolution;
+uniform float u_dashSize;
+uniform float u_gapSize;
+
+out vec4 FragColor;
+void main()
+{
+    if (fract(dist / (u_dashSize + u_gapSize)) > u_dashSize/(u_dashSize + u_gapSize))
+        discard; 
+
+    FragColor = color;
+}
diff --git a/lineStipple.vs b/lineStipple.vs
new file mode 100644
index 0000000..71f52ca
--- /dev/null
+++ b/lineStipple.vs
@@ -0,0 +1,16 @@
+#version 330 core
+layout (location = 0) in vec3 vertices;
+layout (location = 1) in float distances;
+uniform vec4 ourColor;
+
+out float dist;
+out vec4 color;
+
+uniform mat4 MVP;
+
+void main()
+{
+    dist = distances;
+    gl_Position = MVP * vec4(vertices,1.0);
+    color = ourColor;
+}
\ No newline at end of file